/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.table.planner.plan.rules.logical;

import org.apache.calcite.rex.RexNode;

/**
 * Finds whether a {@link RexNode} contains remote calls or not.
 */
public interface RemoteCalcCallFinder {

    // If the node contains directly or indirectly a remote call.
    boolean containsRemoteCall(RexNode node);
    // If the node contains directly or indirectly a non-remote call.
    boolean containsNonRemoteCall(RexNode node);
    // If the node contains directly a remote call.
    boolean isRemoteCall(RexNode node);

    // If the node contains directly a non-remote call.
    boolean isNonRemoteCall(RexNode node);
}
